Shakespeare Style 4186RATCHET MOUNT SOLID NYLON Four-way ratchet design with handle for deck or side mounting. Not for use with antennas longer than 8' in self-supporting mode as this nullifies all warranties. Standard 1"-14 thread. Bolt holes: 5/16 quot; dia. 3 quot; x 1 & 189; quot; on center Product : SHAKESPEARE 4186BP/L206B NYLON RATCHET MOUNT SAME AS LIL 206B Manufacturer : SHAKESPEARE MOUNT Manufacturer Part No : 4186BP/L206B UPC : 719441110581